Piston-ring rough grinder



Nov. 19, 1929. c. E; JOHNSON PIsToNl RING ROUGH GRINDER e' sheets-sheet 1 Filed March 6, 4192e mm n um m w ww s u I l @w Q 2v m mw uw. u R @uw Nov.l9, 1929. c. E. JoHNsoN l 1,736,159

PISTON RINGv ROUGH GRINDER Filed Maron 6, 192s esmas-sheet 2 noe'or Charles Edohn son Vel-*W omnia;

Nov. 1.9, 1929. c. E. JOHNSON 1,736,159v

' PIsToN RING ROUGH @BINDER Y Filed March 6, 1928 6 Sheets-Sheet 5 Nov. 19, 1929. c. E. JoHNsoN PrsToN RING ROUGH GRINDER 'Filed Marcn, 192e a sneewsneet 4 lnoeror Charles .ohn aori Nov. 19, 1929, c. E. JoHNsoN PISTONRING ROUGH GRINDER Filed March 6, 1928 6 Sheets-Sheet 5 SE .dohnso Nov. 19, 1929. c. E. JOHNSON 1,736,159

' l PIsToN lRING ROUGH GRINDEB f y Filed Maron 6. 1928l e sheets-sheet e Lu oerfor Chur es omson for mounted at the upper side of the main supporting casting 1, and is adapted to be belt driven being equipped with the usual loose and fixedpulley, both indicated at 6,

from which the belt may be shifted, Vone to Tof the housing member aand which may be adjusted through anyadjustable manually operable means, indicated at 9 as a rack andl screw adjustment, the rack Vbeing on the bearing-8 and the screw' cooperating therewith.

This permits a limited longitudinal adjust- Y ment of the'shaft 5 and of the grinding wheel carrier- 7 at the front end thereof. The member 7 is of cup form and within it a. cylinder 10 threaded atV its outer side is secured concentric with the outer walls of said member. A back plate 11 threads on to the cylindrical member 10 and against said-'back plate the Vgrindingw'heel 12, at' its rear end, bears.

Y The wheel is clamped 'in place'in any desired manner which, as it forms no lpart yof the present invention, isy not specifically described. rlhe grinding' wheel 12r is in the form of a cylinder open at both ends. It is evident that the position of the plate 11 governs the'position of the outer end ofthe grinding wheel and for a final adjustment thereof the manually operated screw 9 engaging with the rack on the bearing 8 may be used.` Y

The structure so far'as described is not new as it is well known in the grinding machineart. I have applied to this grinding machine the mechanism-which converts it Vinto an automaticout-of-round piston ring casting rough grinder and which-will now after appear.

be described.

On the front face 3 of the upper housing two pairs of brackets 13 and 14 are mounted and secured, thesame extending forward a short distance. One bracket 13 and one bracket 14 isv located at each side of the machine in direct vertical alignment. A spin' dle 15 is rotatably mounted in bearings in each pair of said brackets 13-and 14. The spindle` has an enlarged section 15a between its ends on which a spiral gear 16 is secured. Each spindle at its lower end is provided with a cylindrical head-17 which, at its lower side, is formed with a conical ring' engaging the walls 2 and keyed, respectively, to two shafts 25 and 26 which are located in the same horizontal plane and are spaced apartfrom each other as shown in Fig. 3.

A driving vpulley 27 (see Fig. 1) is carried on the main drive shaft 5. An endless belt 28 passes around the pulley 27 and Valso,

around a wheel 29 fixed to a shaft 30 mounted V-below and transverse of `the two shafts 25and 26, as shown in Fig. Shaft 30 carries a worm 31, indicated in dotted lines in Fig. 3 which meshing with the worm wheel 32 on the shaft 33, drives said shaft andvv through a gear 34 fixed to said shaft 33 meshing with another gear 35 fixed on the shaft 26r drivesthe shaft 26 and thereupon drives `the chain 22 so that both spindles 15 rotate continuously thereover in opposite directionsv the same rate of speed.

The sprocket chain 22 is supplied with a suitable tightener which includes an arm 36 loosely mountedv at one end on the shaft 33 and carrying a roller 37 at its free end to bear against the chain. y A rod 38 is connected with the free end of the arm 36 and at .its upper end passes through a lug 39 pr0- j ecting from a collar 40 loosely mounted on a shaft 41 located above, between and parallel to the two shafts25 and 26. The shaft 41, as will later appear, serves other functions in the machine but is made use'of as av means to mount the collar 40 of the belt tightening construction. f

Two cams 43 are mounted on the two shafts 25 and 26 in the same vertical plane. These cams are identical in form but one is reversed as to position with respect to the other. That' is, referring to Fig. 4, the larger diameter portion of the cam on shaft 26 is above the shaft while at the same time the same larger portion of the cam on the shaft 25 is below and in a position directly opposed to the cam on the shaft 26, as shown. A roller 44 mounted at the lower end of the vertical yrod 45 bears against each cam. The lower; end portions of the two rods 45 are connectedby a rocker arm 46 which is loosely mounted at its middle on the shaft 41.

` The rods 45 extend through the upper side of the'main supporting casting 1 and nearly to the upper end 'of the upperhousing. Each rod passes through van inverted cup 47 and is equipped with a collar 48 above the upper end of said cup (see Fig. 4). Each-rod also has `a second collar 49 vlocated at the lower endof said cup and of a size to freely enter the same with a coiled spring 50 disposedy between the collar 49 and' the closed rend ofthe cup, as shown. A rocking lever 51 meente downwardly from the levers and at their low? er ends are ycarried on Veccentric '53 in turn Y casting 1. n the-'upper sideof the table and cent-rally thereof .a slotted bar 64E fis locatedV and at its :rear end .carries a iblade or-,lat bar 65 located in front ofrand slightly above 560.

mounted on Iashaft :54 which extends between and through the sides of the upper housing member.

The `end of each lever .5 1 is formed with a second yoke 5,1b (see Fig.l 2) which connects with a collar 55 around the upper end of a vmember 56 having a permanently threaded 4connect-ion with the upper end of the enlarged Vintermediate section a of each spindle 15. lIt is evident 4.according that when the machine isbeing operated .there is an alternate raising and lowering of the two rods with a consequent rocking of levers 51 and an alternate raising and lowering ofthe spindles 15., and that when onespind-le 15 is lifted the other spindle is lowered. It

. is also evident that by turning the shaft 54 through a hand lever atits outer end the limits of travel of the lower head 17 may be governed vthat is, the lower side of the head may be brought to al certain ldefinite position with respectto za cooperatinghead below it, which will hereafter bewdescribed, and between whichheads the-,ring yCasting is clamped while it is being ground.

At the fron-t side of the lower supporting casting '1, two sleeves 58 @are east which bushings 59 are secured, .each atV its lower vend being ,closed by an adjustable; plug 60;.

A shaft or spindle 61 is mounted for rotation in each `bushing-59 and -at its lower endv has ya. thrust bearing against the plugv 60'.. Each shaft 61 at its upper lend; is equipped with a 'head 62 :having a flatfhorizontal npper side. The spindlesl5 and-61- Iaregi-n-di'rect vertical -aXia-l alignment and fthe head `62y -aty the upper end .of each spindle 61 is directly below a head 1f? at the lower enel (olf :an -upper spindle 15.. The uppers-ide of Veach head `62 always `remains. in the same horizontal f pila-ne.

A :table -63 'extends lhorizontallly forward from the machines, its upper side being in substantially the saine ,plane with t'thenpper side of the head 62.lr llt is supported by brackets which entend downwardly yand -are secured to Ithe :fron-t of :the main supporti-ng said heads 62 Aand extending from one to the `other (see Fig r-Ihe -bar 64 may ,be

adj usted .-to manly different .positions-and held in -anyrgposition V'to which 4adjusted throughl the clamping bolt 6.6;,v the bolt extending i through the slot lof "member and througliA the table `63` having'. a 'elampingfnutat its lower end. c

T'Ih'ere plis :also mounted art thenpper side A.of the table y63, two. barsa foneat each side of the member ,64 and `divaeinging-'.outward'ly and away therefrom. These barsarealso slotted that theyimaybe longitudinally adjusted and each at its inner end portion bends upwandly ,so .to lie, .at such inner! end portion, ,-a :distance above :the plane .of

.its lower edge'has an angle barv 71 permanertly secured, the ,upperside off is ini the .same plane with lingers: ??2, fone :of which is secured at each sidefof 4ftlaets1b'le. @Sand exe tendone toward each headf6.2,1thelfuippersides ofwt-he '.n'gers f72iamd offthelleadsi62 being in the same plane... Thesefingeisz Hia'yrzbe adjusted in `or out Vso ,-as:rto:bring fthe ssunefat.` their outerend's close tothe heads 62'. It. be evidentyrefferring are. Fig.. :6, that .at .the ends offtheangle bar 71fopeniings1are-Ileftbef tween :the yup-per 1and lower edges of the sheet metalvplates 69 'aaidfd and 'that the grinding wheel 12j 1.rotates hack fof :said .openings 'The Ypdate tlrand' ,theeangle libar 71 .areccan ried at the ends Y of:twospaced anim-s which. are east; integral with a .finember` 75d. slidabiy mounted ionxtheftahle 63A for inward: or outward adijustmentgwhieh isfef'ected hy the screws :715 .as shorwnrn Fig.; ."Pfrhere :is:

alsoiat-.eaeh outer endof the table a finger/.76

rio

the angle .member-7n ingfronteof fthe :plate 105 and between saiidxplate andthe two rods 6 8,

the lowermost `of, .said rings at front: eX?

tend-'mgwover .and bearingaupon the :lingers 7.2 thereby eross'infga slot 'between the front edge :ofthe angle mernher? 1 and the Yrear edge .of the table :63. :It will be 1evident that theilowest ning nesting-ofthe lcOlfu-mn'efringcastings is in a positionoto,begfedpto either one orfthe-other of the head' 62l on .thelower spindles .61. Furthenmore ring castings of dfieelili? rSZeSfIIley `.be :readily vplaced, in `fthe machine `by properly-` adjusting-the .bars 1.651

and -67 and the member 74, .and when -arring casting o-f ,a different size is to `bemround the spindles 61, xor at least their heads 62, ,.-Inust be .changed .to correspond. It 4is `for ythis the table and to.` .pass ener the bar o: blad-e i vreason that the fingers72and 76 and the bar.

64 are made adjustable, also the plate 70 and angle'bar 1 so that different diameter heads 62 may be used inthe same machine and different sizes of ring castings treated. Y

The shaft 41V in the operationof the machine is rocked back and forth. An arm 78 (see Figy) is secured to the shaft and extends over shaft 26 at its free end carrying-*a roller. 79 which rides on a cam 80 fixed to said shaft 26. With lthe rotation ofshaiit 26 projecting rearwardly from a block 86 which' in .turn extends through a slot 87 in a bar 88 pivotally mountedat itslower end ona stud 89 as shown in Figi 7. An adjusting screw 90 threads at its upper end through the block 86 and passes through an eye 91 fastened to and projecting from the lower end of the bar 88, said rod 90 having fixedvcollars, one above and the other belowthe eye 91.y It is evident that the block 86 with the roller Vcarried thereby may be adjusted to different positions within limits prescribed by the length of the slots 83 and 87. The bar 88 extends upwardly and at. its upper end has a relativelyl shortl longitudinal slot 92 vcut therein. The upper end of the bar 88 is receivedV in a housing member 93 with aspring 94 between the upper end of bar 88 and the upper closed end of the housing. Rod 95 extends through the sides ofthe housing and through the slot 22 and at: its front end is. equipped with a roller 96 which rides against ytheunder side ofa rail 97 integral with and extending downwardly from the table 63, (see Fig. 7).

The rod 95 at its rear end,`after passing through the housing 93,'also passes through a feed finger 98 substantially midway between the ends thereof therebyserving to pivotally mount said finger. The finger at its lower end carries a pin 99 which extends toward the rear side 'of the bar 88 and lies between two members 100 which are pivotally connected at their ,lower ends to the rear side of the bar 88 and extend upwardly towardv the housing, being connected at their upper ends Y and drawn toward each other by a coiled spring 101, as shown in Fig. 9. -A pin 102 extends from the rear side of the bar 88 between the two members 100 Vand limits the scribed,` bar 88 is oscillated back and forth Aaboutthe stud 89 and the feed finger 98 env Y gages against a side of theY lowermost ring casting 77 in the column of castings whereupon said lowermost casting is moved to one of the heads 62: During the' movement of the 62 reaches said head when the-clamping head l 17 immediately above is in elevated position or in the position shown at the right in Fig. 6. 1n moving to vthe head 62 it is guided by the bar orblade 65 and the back or vertical flange of the angle member 71 and rides over the 'horizontal flange of said angle bar and over oneof the fingers 72. Y i When the ring casting has been deposited on the head f 62 there follows immediately thereafter a lowering ofthe spindlel to bring the conical surface 18 of the upper head 17 at thelower end of said spindle intor contact with the inneredges of the ring casting as shownV in Fig. 8. The spring 60 associated with the operating mechanism for the spindle 15 which has been Vlowered is a strong spring but can compress a limited amount or sufcient to take care of the minorvariations in the width of any onesize of ring castings. The pressure exerted by the two heads against the opposite sides of the ring and with the conicalface 18 entering into the ring casting at its upper end, causes the ring casting to be distortedto circular form.

The head 17 as soon as it engages withv and clamps'a ring casting against the headk ioo alternate operation of the spindles 15 in their Y raising and lowering, one spindle is in upper position and an opening ismade between its head 17 .and the head 62 below tol receive a ring casting, while at the opposite side of the machine a ringcasting is held by the two other heads 17 and 62 and' is being ground at its outer curved surface. There is thus provided a doubling of the quantity production of the machine using only one feeding means to feed the rings alternately to one side or the other of the machine.

It is evident that the stroke of the bar 88 may be adjusted and controlled by the adjusting screw 90 for different sizes of rings in order to stop the feed finger 98 at a proper position when a ring has been delivered to a stretching of the spring 101 which eliminates the possibility of breakage or injury to the machine from too abrupt engagement of the ngers with a ring 'casting and startingsuch casting in motion.v

The construction described is very practical and useful and has proved its value in use'. There are many variations in structural de- .tail which may be resorted to in embodying vperiodic intervals into a holding means,

holding means in which said ring castings are adapted to be clamped and held when fed thereto, means for rotating said holding means, and means for grinding theV outer curved surface of saidring castings, while the same are held and rotated and means for removing the ring from said holding means.

2. In a machine of the class described, a vertical spindle having a head at its upper end, a second vertical spindle located in axial valignment with the first spindle having a head at its lower end, means for driving the second spindle to rotate the same, means for periodically raising and lowering said second spindle, means for periodically feeding `a ring casting to and between said heads when the vertical spindle has been elevated to'an upper position, said ring casting being clamped between the heads when the second spindle is carried to its' lower position, and means for machining the outer curved surface of said ring casting while it is clamped between said heads.

8. In a machine of the classdescribed, a rotatably mounted head having a horizontal upper face, a second rotatably mounted head located over the first head and in alignment therewith, means for periodically moving said second head away from the first head and thereafter moving it toward said first head, holding it for an interval and then moving it away therefrom, a horizontal table on which a quantity of'ring castings one over the other are adapted to be placed and held, feeding means for periodically feeding a ring casting from said column of castings on to the first head when the two heads are separated, said ring casting being clamped between the heads when the second `head is moved toward said first head, and a rotatably mounted grinding wheel positioned to `grind the outer curved surface of said casting when it is clamped between said heads.

4. In a machine of the class described, a horizontal table on which a quantity of con- `mounted to turn about a vertical axis in which a ring casting vis adapted to be clamped and held, means for feeding the ring cast'- ings to said holding means at periodic intervals, means for releasing said holding means at intermediate intervals, means for driving the holding means to rotate the same and to rotate Said ring casting when held therein, and means for machining the ring castings at their outer curved sides during the period that they are held` by said holding means.

5,. In a machineof the class described, a rotatably mounted two-part separableholding means for individua-l piston ring castings mounted to turn about a vertical axis, means included in the construction of said holding means for securely clamping a pistonring casting and holding it in a horizontal plane, means for rotating the holding means about a vertical axis, means for periodically separating and then bringing the parts for said holding means together, a horizontal table -on which ring castings may be located `in a vertical column one over the other,means for periodically feeding the lowermostv ring casting `of said column of castings to said holding means at the time of separation of the parts thereof, and means for machining the outer curved sides of a casting while held and rotated by said holding means.

6. In; apmachine of theclass described, holding means mountedfto turn' about a vertical axis, in which individual ringcastings are adapted to be clamped, means fory rotating said holding means about said vertical axis, means for feeding ring castings individually to the holding means at periodic intervals, mea-ns included in the holding means to engage with a ring casting to clamp and securely hold said casting in the holding means whereby it will rotate therewith, and means'for grinding thering castings at their outer curved sides while held in the holding .means and rotated'therewith.

7. In a machine of the class described, a support, a vertically positioned rotatablyl mounted shaft located at the front of said support, ahead attached to said shaftat the .upper end thereof, a second verticallypositioned and rotatably mounted shaft located above and in alignment withfthe first shaft, a head at its lower end havinga conical por'- .tioned head at the time that the second shaft and its attached head are in raised position, said ring casting being clamped between the heads .on downward movement of said second shaft, and' a rotatably mounted grinding wheel positioned back of said heads for grindtion at the lower end thereof, means for con-:1

ing the ringV casting at its outer curved surface when said ring casting is clamped beupper side of the first head, said tablebeing adapted to carry a column of ring castings positioned one over the other, means on the table for holding and guiding the Vrings in position one above the other, a feeding device mounted for oscillation on said support below said table and having a feed finger atV its upper end to engage against a side of the lowermost ring casting in said column yof castings to move the same on to said rst head atV periodical intervals and at times when ythe heads are separated, means for oscillating said feeding mechanism and means p for grindingY ring castings held between said heads at its outer curved surface.

9. In a machine of the class described, a

support, a horizontal ltable carried by said support adapted to carry a plurality of ring Y castingslocated one over the other, means for' maintaining said ring castings in a ver- Vtical column, ring holding means mounted at each side of thestable, means for alternately opening and closing said holding means and Ikfor opening one holding means when the yother is closed, means for alternately feeding the lowermost ring castings on the table to said holding meansat the times thatthe Vholding means are in open position toreceive ring castings, thereafter being clamped and Vheld when the Vholding means closes Y against the ring casting, and meansfor machining vthe outer curvedV surfaces of ring V,castings when heldin said holding means.

' 10. In a machine of the class described, a

isupport,a horizontal table carried by said support, said table being adapted to sup' port vanvertical column of ring castings locatedone over the other, guiding means for said column of ring castings to maintain the vsame inproper position one over the other carried on and above said table, a vertically positioned spindle mounted on'said support Vat each side of the table, a head mounted at 'the upper end of each of said spindles having'its upper Aside in the same plane with the upper side of the table, feeding means mount- .ed below the table and engaging alternately the opposite sides of the lowermost ring castings in the column of castings to move said lowermostring castings alternately to said spindles, means for driving said additional spindles, means for periodically raising and lowering said additional spindles with their attachedv heads, the same being raised at .the times ring'castings are carried to the first mentioned heads. andlowered thereafter to 57-5 clamp said ring castings betweensaidrheads and grinding means rotatably mounted back of said pairs of heads to grindfsaid ring castings at their outer curved surfaces when the same are clamped between said heads;

1l. In a machine of the class described, a support, a horizontal table carried by said support, a vertical spindle rotatably mounted on the support adj acent one end of the table, a head carried at theupperend of said spinvdle having a horizontal'upper side in the same plane with the upper side of the table, a second vertically positioned spindle rotatably mounted on said support above and in alignment with vthe first spindle, Va second head fixed to the lower 'end of the second spindle, means for driving said second'spindle, means for periodically raising and lowering said secondV spindle and its attached head, a horizontal rock shaft mounted in said support below the table, a bar mounted on said support at its lower end for oscillation about a horizontal axis, an Aarm secured to said rock shaft at-one end and connected with saidV bar at' the other end to oscillatev1 the bar on rocking the shaft, means to rock said shaft, and a feed fingermounted at the upper end of said bar and extending a short distance above the upper side of the table,vfor the purposes described. l

l2. A construction containing the elements in combination defined inclaim 11, combined with a housing slidably mounted at the upper Vend of said bar on which said feed finger is carried, spring means interposed between said housing and the end 'of the bar normally acting to move said Vhousing upwardly, a roller mounted on said housing, and a horizontal track attached to and depending from the table against the under side of whichthe roller bears to cause the upper end of the feed fingerto move in a horizontal plane slightly above the upper side of the table as said bar is oscillating about its horizontalA axis.

13. In a construction of the class described, Y

a support, a horizontal table to carry a plurality of ring castings located in a vertical column one above the other, holding means for said ring castings adjacent opposite ends of the table, Vmeans for periodicallyrseparating said holding means to receive a ring casting and thereafter bringing the holding means' together lto clamp and holdv said casting, means for rotating said holding" means, means for machining said ring castings at their outer curved sides while held and rotated by the holding means, and feeding means mounted on said support and extending a short distance above the upper side of said table and movable back and forth in a horizontal plane to engage against the outer side of the lowermost ring in said column of ring castings and move it to said holding means, alternate ring castings of the column of castings being engaged by said feeding means on opposite sides.

14. A feeding means for engaging with the lowermost casting of a vertical column of ring ycastings located one over the other and carried on a horizontal table comprising, a vertical bar pivotally mounted to oscillate about a horizontal axis at its lower end and located below and extending toward said table, a housing located over the upper end of said bar, said bar adjacent its upper end having a longitudinal slot therein, a shaft passing through the sides of said housing and through said slot, a roller at one end of said shaft, a spring within said housing between its upper end and the upper end of the oscillating bar, a feed nger pivotally mounted between its ends on the opposite end of said shaft, adapted at its upper end to extend slightly above the upper side of said table so as to engage with the lowermost casting of said'column of ring castings, two members pivotally mounted on said vbar at their lower ends and extended upwardly to the housing, a coiled spring connecting said members at their upper ends, a pin on said bar located between said members and a second pin at the lower end of said feed finger lying between said members. J Y

15. A feed mechanism including the elements recited in combination in claim 14, said bar having a longitudinal slot therein between its ends, a rock shaft mounted on the support, means for rocking the shaft, an arm attached to the rock shaft and extending downwardly back of said bar, said arm also having a slot therein back of said last mentioned slot in said bar, a block extending through the slot in the bar, a roller rotatably mounted on said block extending into the slot of said arm, and an adjusting screw mounted on said bar and threaded through said block for the purposes described.

16. Ina machine of the class described, two spaced apart holding means in each of which a ring casting is adapted to be clamped and held, a holding device for a quantity of continuous ring castings located in a vertical column one over the other, means for feeding the ring castings alternately to said holding means at periodical intervals, and means for grinding the ring castings at their outer curved sides while held by the holding means.

In testimony whereof I aiix my signature.

CHARLES E. JOHNSON. 

